Paper-stock-screening machine.



A; J, HAUG. PAPER STOCK SCREENlNG MACHINE.

7 APPLICATION FILED SEPT.8, 1915- 1,1 W33 11 r Patented June 20, 1916.

4 SHEETS-SHEET I.

: T ||r. cnumnm PLANOGRAPII co. WASHINGTON, 07 c.

A. I. HAUG.

PAPER STOCK scmmme MACHINE.

APPLICATION FILED SEPT- 8| 1915- I 7 L1 1 Y Patented June 20, 1916.

4 SHEETS-SHEET 2.

THE co umn PLANOGRAPH co., WASHINGTON. D- c.

A. J. HAUG.

PAPER STOCK SCREENING MACHINE. APPLICATION mto SEPT- 8, I915.

Patented June 20, 1916.

,QLM,

A THE COLUMBIA PLANOGRAPH 0)., WASHINGTON, D. C.

A. J. HAUG. PAPER STOCKSCREENING MACHINE.

APPLICATION FILED'SEPT- B. 1915.

11 1 8 7,?3 1 a Patented June 20, 1916.

4 SHEETS-SHEET 4.

THE! COLUMBIA PLANOGRAPH c0.. WASHINGTON, D. c.

r rib.

ANTON J. HAUG, OF NASHUA, NEW HAMPSHIRE, ASSIGNOR TO IMPROVED PAPERMACHINERY COMPANY, OF NASI-IUA, NEW HAMPSHIRE, A CORPORATION OF MAINE.

PAPERS'I'OCK-SGREENING MACHINE.

Specification of Letters Patent.

Patented June 20, 1916.

Application filed September 8, 1915. Serial No. 49,596.

To all whom it may concern:

Be it known that I, ANTON J. HAUG, a citizen of the United States, and aresident of Nashua, county of Hillsboro, State of New Hampshire, whosepost-oflice address is care of Improved Paper Machinery Company, Nashua,New Hampshire, have invented an Improvement in Pa13er-Stock=ScreeningMachines, of which the following description, in connection with theaccompanying drawings, is a specification, like characters on thedrawings representing like parts.

This invention relates to paper machinery and more particularly toimprovements in machines for screening paper pulp.

An important object of the invention is to provide a screen of greaterefficiency than those heretofore in use. Screens as heretoforeconstructed have consisted in unitary bodies provided with screeningopenings through which the stock is forced from the interior of thescreen drum. Owing to the work in keeping the openings clean, a largepart of the screening area is lost after the screen has been inoperation for a while, and the screen is operated thereafter at acomparatively low efficiency.

In a prior application filed by me I have disclosed a screen havingopenings auto matically kept clean, such openings being preferablyformed between relatively movable parts. The present invention in oneaspect thereof constitutes an improvement upon the screen disclosed insaid former application.

The invention will be best understood by reference to the followingdescription when taken in connection with the accompanying illustrationof one specific embodiment thereof, while its scope will be moreparticularly pointed out in the appended claims, it being understoodthat while I have shown my invention as applied to a centrifugal screen,it is in no wise limited thereto, but may be employed in connection withscreens of various types and construction and used for differentpurposes.

In the drawings: Figure 1 is a plan view of a paper and pulp screenembodying one form of the invention; Fig. 2 is a longitudinal sectionalelevation thereof upon the irregular dotted line 22 of Fig. 4:; Fig. 3

the rotary or centrifugal type, but which may be of any other suitabletype, is provided with a casing 01' housing 1 having a stock inlet 2, anoutlet 3 for screened stock, shown most clearly in Fig. 4, and an outlet4 for tailings or waste, shown most clearly in Fig. 2. Said housingincloses the operative parts of the screen.

The stock which is fed through the inlet 2 is carried through astationary conduit 5 and is deflected at one end by the bellshapedspreader plate 6 against the interior of the screen. The said spreaderplate is fast upon the main shaft 7, mounted in main bearings 8, 9 ofany suitable construction. The framing of the machine is provided withsuitable brackets 10, 11 for supporting the said main bearings. The saidmain shaft 7 is provided at one end with a driving pulley 12 andadjacent the opposite end with a double-thrust bearing 13 provided witha longitudinally extending hub 14 internally threaded as represented at15. In axial alinement with the main shaft 7 is a short shaft 16suitably mounted in a bearing 17 and threaded at its inner end 18 toengage the internal threads upon the hub 14 of the double-thrustbearing. Fast upon the end of said shaft is a hand wheel 19. Theconstruction of parts is such that by rotation of the hand wheel 19, thedouble-thrust bearing 13 of the main shaft is moved in one direction orthe other, thereby to impart axial adjustment to said main shaft.

In my previous application above referred to, I have disclosed a screenprovided with a series of slots or openings, the walls of each openingbeing composed of two members, at least one thereof being movable. Inthe present invention I contemplate the employ ment of relativelymovable members, the spaces between which constitute the slots oropenings of the screen. I contemplate the provision of any suitablemeans for effecting adjustment of said members.

The provision of means for effecting the screen may be variously formed.

adjustment of the screening openings enable me to make a finer grade ofpaper with a poorer grade of stock than has heretofore been possible. Iam enabled in the practice of my invention to provide openings or slotsof from" two thousandths to four thousandths of an inch in thickness foreither paper or pulp machines. In the practice of my invention, however,I am in nowise limited to such dimensions, as the diameter and size ofthe slots of openings may be widely varied within the scope and purposeof the invention/ Heretofore, so far as I am 1 where such walls areprimarily a fixed distance apart.

Furthermore, the adjustment also permits the taking up of wear. So faras I am aware, I am the first to provide screening openings which may bevaried in size, and I desire to ClitllllllllG same broadly. The walls ofthe slots or openings of the ably, however, I provide series of disks ormembers," certain of which are adjustable,

and certain'of which in the disclosed form V of the invention are-fixed.

Herein for the purpose I have keyed or otherwise fixed upon the mainshaft 7a series of spiders or spider-like members20 having outerring-like portions 21, shown most'clearly in Fig. 2. The said spiders ormembers 20 have hubs 22 keyed'or otherwise fixed upon the said mainshaft 7 where- 'by in the rotation of the said main shaft, the

spiders or members 20 are rotated therewith.

VVithin the end walls of the housing 1 I mount four parallel shafts 23,indicated most clearly in Fig. 4, said shafts being positioned about themain shaft 7 at suitable distances apart. Each of said shafts is mountedin suitable bearings 24, 25, formed in the endwalls of the'housing; andkeyed or otherwise fixedly positioned upon each of said shafts 23 is aseries ofdisks 26 having hubs '27 keyed upon said shaft. Thecircumferential portions of eachof said disks 26 may be of any suitableconstruction, but herein I have represented each of said disks assomewhat flared or widened at one face adjacent the periphery thereof,as indicated at 28 in Fig. 2;

The spiders or members 20 mounted upon the main shaft 7 are laterallyadjustable by Prefer-- means of the axial adjustment of said main shaft7 and the said members 26 are, in the disclosed embodiment of myinvention, laterally adjustable. Such lateral adjustment may be effectedin any suitable manner, but preferably by means of the axial adjustmentof the several shafts 23. To this end I may provide any suitable means,but I have herein represented each of said shafts 23 as threaded at oneend 29. Upon said threaded ends of said shafts 23 are mounted gears 30having hubs 31 internally threaded at 32 to receive the threads of theshaft 23. I have herein represented each of said gears 30 as having asurrounding'gear guard 33. Each of said gear guards is provided with adouble-thrust bearing 34.

By imparting rotative movement to the gears 20 I effect axial adjustmentof the shafts 23. Herein for the purpose I have represented the housing1 as having thereon a suitable bearing 35 surrounding the main shaft 7and loosely receiving thereon the gear 36 meshing with each of theadjusting gears 30. By rotation of the gear 36 the gears 30 are turnedin either direction and thereby axial movement is imparted in thedesired direction to the shafts 23. I have herein represented said gear36 as having fast thereto a hand wheel 37, permitting the ready rotationthereof.

In addition to the spiders or members 20 and disks 26 I preferablyprovide another series of disks constituting a wall of the slot openingor openings. To this end I have in the disclosed embodiment of theinvention provided a plurality of fixed shafts, spindles or rods 38,herein shown in Fig. 4 as four in number. These stationary shafts orspindles are positioned in parallelism about the main shaft, suitablyspaced therefrom and from each other. Each of said stationary shafts orspindles 38 is mounted in hearings or recessed portions 39, 40 of theheads of the housing and extends therethrough at one end where it isprovided with suitable lock nuts 41 whereby the said shafts or spindlesmay be held fixedly in position. Keyed or otherwise fast upon eachshaft, spindle or red 38 is a series of disks 42 provided with hubs 43received upon said shaft. As shown most clearly in Fig. 2', each of saiddisks 42 extends between one of the disks 20 upon the main shaft 7 andone of the disks 26 upon one of the shafts 23. Preferably each of saiddisks 42 is provided at its periphery with a laterally extending rib 44which may in certain positions of adjustment rest upon or contact withthe periphery of the disks 26.

In the disclosed embodiment of the invention the screen is in effect ofa general conical form, this being secured by the employment of disks 20which are of successively greater diameter from the stock inlet to theoutlet, by the employment of disks 42 the openings whereof are ofsuccessively increasing diameter from said stock inlet to the stockoutlet and by the employment of disks 26 which are also of successivelyincreasing diameter from said stock inlet to the stock outlet.

Viewing Fig. 2, it will be observed that the disks 20 and 26 may beadjusted l aterally in either direction with respect to the stationarydisks t2 and that therefore openings or slots of any suitable diametermay be formed between said disks, which may within the scope and purposeof my invention be brought into contact or substantially into contactwith each other. The lateral lips A of the disks 42 provide bearingsalong or with respect to which the disks 26 may slide in the lateraladjustment of the latter. The screen in this embodiment of my inventionis provided with suitable water rings to prevent leakage of the stock. Ihave herein represented such rings at 45, 46 and d7. I also providesuitable shower pipes, herein represented at 48 and 4:9 and whichpreferably are the same in construction and function as thecorresponding pipes shown in my said earlier filed application. I alsoprovide a suitable water distributing chamber 50 and a water feed pipe51 which may also be similar to the corresponding parts of saidapplication. In that embodiment of the invention herein shown, one wallof each slot or opening is formed by the rotating spiders or members 20,the other wall of each opening or slot being formed bv the lateralsurface either of the laterally adjustable disks 26 or the fixed disks42, the construction being such that the disks 26 and 4-2 are constantlyin lateral engagement by reason of the lateral lips 44 upon said disks42. The lateral adjustment of the disks 20 and 26 with respect to thefixed disks 4E2 effects the desired variation in or adjustment of thediameter of the slits or openings of the screen.

Within the broad scope and purpose of my invention I contemplate theprovision of a screen which may be fiat, conical, cylindrical or of anyother suitable shape, provided with slots or openings, the walls of eachslot or opening (if a plurality thereof be employed) being composed ofopposing members whereof at least one is movable in a rotatable orlongitudinal direction such as to effect a clearing of the slots oropenings and a drawing of the fibers through said slots or openings, atleast one of said members being laterally adjustable so as to vary theeffective width of the slots or openings. I am not limited to the use oremployment of any particular number of slots or openings, one only ofwhich may be employed within certain aspects of the invention. Byproviding a screen composed of opposing members, preferably spaced so asto provide a slot, or slots, I efi'ect a drawing action of the fibersbefore they enter the slots and also in their passage therethrough. Ithereby effect a displacement of the individual fibers from the body ormass thereof.

From the foregoing description it will be evident that in the use of thedisclosed embodiment of my invention the stock as it is delivered to thescreen is caused to move to the interior thereof and the unscreenedportions moved toward the larger or delivery end. lVater is supplied tothe shower pipes 18 and 49. In the rotation of the screen the water isthrown by centrifugal force to the circumferential walls of the housingand enters the said shower pipes from which it is supplied to theinterior of the drum. I thereby avoid the necessity of stuffing boxes.Obviously, however, water may be supplied in any other suitable way.

Having thus described one illustrative embodiment of my invention, Idesire it to be understood that although specific terms are employed inthe foregoing description, they are used for purposes of description andnot for limitation, the scope of the invention being set forth in thefollowing claims.

Claims:

1. In an apparatus of the class described, a screen having a series ofslots or openings, the walls of each opening being composed of twomembers at least one of which is movable in the direction of the lengthof said slots or openings, and means for changing the width of saidopenings.

2. In an apparatus of the class described, a screen having a series ofslots or openings, the walls of each opening being composed of two men'bers at least one of which is movable in the direction of the length ofsaid slots or openings, means for changing the width of said openings,means for supplying stock to the screen and means for discharging thescreened material and the tailings.

3. In an apparatus of the class described, a screen having a seriesof'slots or openings, the walls of each opening being composed of twomembers, one of which is fixed and the other of which is movable in thedirection of the length of said slots or openings, and means foreffecting a change in the width of said slots or openings.

4. In an apparatus of the class described, a screen having a series ofslots or openings the walls of each opening being composed of twomembers, one of which is fixed and the other of which is movable in thedirection of the length of said slots or openings, means for effecting achange in the width of said slots or openings, means for supplying stockto the screen, and means for discharging the screened material and thetailings.

5. In an apparatus of the class described, a screen comprising membersseparated by slots, said members being alternately fixed and movable inthe direction of the length of the slots, and means for varying thewidth of said slots.

6. In an apparatus of the class described, a screen comprising membersseparated by slots, said members being alternately fixed and movable inthe direction of the length of the slots, means for varying the width ofsaid slots, a screen stock inlet, a screen stock outlet, and an outletfor the tailings, all communicating with said screen.

, 7,. In an apparatus of the class described, a screen having a slot oropening, the walls thereofbeing composed of two members, at least one ofwhich is movable in the direction of the length of the slot or opening,thereby to keep the slot cleaned and to draw the fibers therethrough,and means for varying the width of said slot.

8. In an apparatus of the class described, a screen having a slot oropening, the walls thereof being composed of two members, at least oneof which is movable in the direction of the length of the slot oropening,

gas

thereby to keep the slot cleaned and to draw the fibers therethrough,means for varying the width of said slot, means for supplying stock tothe screen, and means for discharging the screened material and thetailings.

9. In an apparatus of the class described, a screen having a pluralityof members to effect drawing action of the fibers and to separateindividual fibersfrom the mass thereof, the members of said screen beingrelatively laterally. adjustable, whereby slots or openings may beprovided therebetween, at least one of said members being movable 1nthe'direction of the lengthof said slots or openings.

10. In an apparatus of the class described,

.- a screen comprising members. separated by circumferential slots, saidmembers being alternately fixed and movable in the direction of, thelength of said slots, and means for effecting changeninthe width of saidslots. 4

11. In paper manufacture, a centrifugal screen having circumferentialscreening slots adjustable in width for the stock to' pass from theinterior to the exterior of the screen, the said slots being formedbetween relatively movable parts.

12. In paper manufacture,a centrifugal screen having a plurality ofparts separated of the other set and spaced therefrom by circumferentialscreening openings adjustable in width. I

14. In paper manufacture, a centrifugal screen having a rotatable memberprovided with a plurality of ring-shaped members separated bycircumferential openings and other circumferential members movablerelatively thereto in the direction of the length of saidcircumferential openings between said first-named members, but separatedtherefrom, and means for varying the width of said circumferentialopenings.

15. In paper manufacture, a centrifugal screen having a plurality ofcircumferential screening openings, means located within said screeningopenings for keeping the same clean, and means for changing the width ofsaid openings. p

16. In paper manufacture, a centrifugal screen having a plurality ofopenings, means circumferentially arranged in said openings but spacedbetween the walls thereof, said means being movable relatively to saidscreen, and means for changing the width of said openings.

17 In an apparatus of the class described, a screen having three sets ofmembers providing slots or openings therebetween, one set of saidmembers being longitudinally movable in the direction of said slots oropenings, and a plurality of sets of said members being laterallyadjustable to effect changes in the width of said slots or openings.

18. In an apparatus of the class described, a centrifugal screen havingthree sets of disk-like members forming slots or openings therebetween,one set at least of said members being rotatable, and a plurality ofsaid sets being laterally adjustable.

19. In an apparatus of the class described, a centrifugal screenhaving amain rotatable shaft provided with a set of disk-like members, and aplurality'of axially adjustable shafts having disk-like membersinterposed between the disks or members of said main shaft.

20. In an apparatus of the class described, a centrifugal screen havinga main rotatable shaft provided with a set of disk-like members, aplurality of axially adjustable shafts having disk-like membersinterposed be tween the disk-like members of said main shaft, and aplurality of supports for a fixed third set of disk-like members alsointerposed between the members of said main shaft. j

21. In an apparatus of the class described, a screen having a main shaftprovided with a series of disk-like members rotatable therewith, aplurality of shafts parallel with the main shaft and having disk-likemembers thereon, alternating with those of the main shaft, and means foraxially adjusting said plurality of shafts whereby circumferential slotsor openings of adjustable width are formed between said. disk-likemembers.

22. In an apparatus of the class described, a main shaft having a seriesof disk-like members rotatable therewith, means axially to adjust saidshaft, a plurality of shafts surrounding the main shaft and each havingthereon disk-like members alternating with those of the main shaft, andmeans axially to adjust said plurality of shafts.

23. In an apparatus of the class described, a main shaft having a seriesof disk-like members rotatable therewith, means axially to adjust saidshaft, a plurality of shafts surrounding the main shaft and each havingthereon disklike members alternating with those of the main shaft, meansaxially to adjust said plurality of shafts, a plurality of stationaryshafts also surrounding said main shaft, and a series of disk-likemembers upon said stationary shafts also alternating with the disk-likemembers of the main shaft.

24. In an apparatus of the class described, a screen having a main shaftprovided with a series of disk-like members rotatable therewith, twosetsof shafts surrounding said main shaft and each having a series ofdisk-like members thereon alternating with those of the main shaft, andmeans for effecting the relative lateral adjustment of said series ofdisk-like members whereby screening openings of adjustable width may beprovided between said disk-like members.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

ANTON J. HAUG. Witnesses:

ROBERT I-I. KAMMLER, IRVING U. TOWNSEND.

Genie-a of this. patent may be obtained for five cents each, byaddressing the Commissioner of ratenta. Washington, D. G.

